P. In the United States alone, studies have estimated that sleep depri
Q. Most adults should be aiming for eight hours per night. Children, teenagers, and older adults typically need even more.
R. Unless you’re doing work that doesn’t require much thought, you are trading time awake at the expense of performance.
S. According to the experts agree that 95 percent of adults need to sleep 7 to 9 hours each night to function optimally.
Right Answer is: C
The hazard of sleep deprivation, which is the central theme of the passage is mentioned in the Statement P, so it should be the first sentence. Sentence R then supports statement P with a valid argument. It should be followed by Sentence S as it states the facts and stats from experts which are then explained in detail in Sentence Q.
The correct sequence is PRSQ.